Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Heather Graven"'
Autor:
Giulia Zazzeri, Heather Graven, Xiaomei Xu, Eric Saboya, Liam Blyth, Alistair J. Manning, Hannah Chawner, Dien Wu, Samuel Hammer
Publikováno v:
Geophysical Research Letters, Vol 50, Iss 15, Pp n/a-n/a (2023)
Abstract Radiocarbon (14C) is a powerful tracer of fossil emissions because fossil fuels are entirely depleted in 14C, but observations of 14CO2 and especially 14CH4 in urban regions are sparse. We present the first observations of 14C in both methan
Externí odkaz:
https://doaj.org/article/6a9a2e54b9dd40578cab85e255502e74
Publikováno v:
Environmental Research Letters, Vol 19, Iss 11, p 114073 (2024)
Carbon monoxide (CO) is an atmospheric pollutant with a positive net warming effect on the climate. The magnitude of CO sources and the fraction of fossil vs biogenic sources are still uncertain and vary across emissions inventories. Measurements of
Externí odkaz:
https://doaj.org/article/dbaf33790c684f3f91a2fa104b209fe6
Publikováno v:
Earth's Future, Vol 9, Iss 12, Pp n/a-n/a (2021)
Abstract Emissions of carbon dioxide from fossil fuel combustion are reducing the ratio 13C/12C, δ13C, in atmospheric CO2 and in the carbon in the ocean and terrestrial biosphere that exchanges with the atmosphere on timescales of decades to centuri
Externí odkaz:
https://doaj.org/article/bdbede2dca304dedb5a52f229c81e014
Lateral carbon transport through inland waters plays a critical yet often overlooked role in the delicate balance of carbon exchanges controlling the net uptake and storage of anthropogenic carbon in terrestrial ecosystems. Though new terrestrial car
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a33eb4a82a9ca9129feb378eeb9c61ef
https://doi.org/10.5194/egusphere-egu23-14183
https://doi.org/10.5194/egusphere-egu23-14183
Measurements of radiocarbon (14C) in atmospheric methane (CH4) provide a powerful tool to distinguish fossil from biogenic methane emissions, because fossil methane is completely devoid of 14C. However, these measurements are particularly challenging
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9eae7fe66dcb1f8eb628e7409768819b
https://doi.org/10.5194/egusphere-egu23-12735
https://doi.org/10.5194/egusphere-egu23-12735
Autor:
Ralph F. Keeling, Heather Graven
Publikováno v:
Annual Review of Environment and Resources. 46:85-110
The past century has been a time of unparalleled changes in global climate and global biogeochemistry. At the forefront of the study of these changes are regular time-series observations at remote stations of atmospheric CO2, isotopes of CO2, and rel
Publikováno v:
Pookkandy Byju
Radiocarbon (14C) is a valuable tracer of ocean circulation, owing to its natural decay over thousands of years and to its perturbation by nuclear weapons testing in the 1950s and 1960s. Previous studies have used 14C to evaluate models or to investi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9e3ffcca2353c8d09cf962570a15e29
https://doi.org/10.21203/rs.3.rs-2164654/v1
https://doi.org/10.21203/rs.3.rs-2164654/v1
Autor:
Eric Saboya, Heather Graven
Satellite observations of greenhouse gases are used to constrain some global forecast models and are included in reanalysis models. The Copernicus Atmosphere Monitoring Service (CAMS) produces twice daily atmospheric composition forecasts using a dat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a2856fdfd0f213a2428d23217ed46d3
https://doi.org/10.5194/egusphere-egu22-12826
https://doi.org/10.5194/egusphere-egu22-12826
Publikováno v:
Atmospheric Chemistry and Physics